Detailed Weather Data for Project: THUN

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 30.65 9.06 65.00 61.25 07Mar2018 9 a.m. 33.74 11.11 58.33 321.67 07Mar2018 10 a.m. 36.59 13.70 52.25 495.00 07Mar2018 11 a.m. 39.86 11.18 46.33 684.67 07Mar2018 12 p.m. 43.07 10.79 42.75 786.75 07Mar2018 1 p.m. 46.58 11.04 37.67 827.67 07Mar2018 2 p.m. 49.77 10.29 31.50 803.50 07Mar2018 3 p.m. 51.08 7.38 29.25 708.25 07Mar2018 4 p.m. 52.20 5.31 27.50 561.75 07Mar2018 5 p.m. 52.61 7.33 27.00 366.75 07Mar2018 6 p.m. 48.56 4.47 32.00 52.00 07Mar2018 7 p.m. 44.96 1.34 35.00 0.00 07Mar2018 8 p.m. 41.99 1.34 44.50 0.00 07Mar2018 9 p.m. 39.92 0.82 49.67 0.00 07Mar2018 10 p.m. 37.34 1.49 57.00 0.00 07Mar2018 11 p.m. 35.69 2.07 66.75 0.00 08Mar2018 12 a.m. 33.66 1.12 69.50 0.00 08Mar2018 1 a.m. 33.26 0.67 70.50 0.00 08Mar2018 2 a.m. 32.31 1.29 72.50 0.00 08Mar2018 3 a.m. 32.06 0.82 73.33 0.00 08Mar2018 4 a.m. 31.01 0.73 74.25 0.00 08Mar2018 5 a.m. 30.65 0.89 81.00 0.00 08Mar2018 6 a.m. 28.99 0.00 85.25 0.00 08Mar2018 7 a.m. 29.57 0.00 83.00 6.50 Accuml. Values 936.12 114.24 1311.83 5675.76 Num. Valid Values 24 22 24 24 Avg. Values 39.01 5.19 54.66 236.49 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.89 200.52 54.66 488.00 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4534 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.4113 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.4636 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5364 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2060 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 3.6820 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.1537 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.143 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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